Mold for pipe.



PATENTED DEC. 6, 1904. L. R. PECK.

MOLD FOR PIPE.

APPLIoATIoN FILED SEPT. sa, 1904.

2 SHEETS-SHEET 1.

N0 MODEL.

iVm/VESSES No. 776,612. PATENTED DEC. 6, 1904. L. R. PBGK.

MOLD FOR PIPE.

APPLIoATIoN FILBD'SBPT. za, 1904. No MODEL; 2 SHEETS-SHEET n.

9 5 9 /i la /1 /3 /z 5 8 lm' @www vUNITED STATES Patented December 6, 1904.

PATENT OEEICE.

LUKE R. PECK, OF CARO, MICHIGAN, ASSIGNOR OF ONF-HALF TO FREDERICK W'HEAT, OF CARO, MICHIGAN.

MOLD FOR PIPE.

SPECIFICATION forming part of Letters Patent No. 776,612, dated December 6, 1904. Application le September 23, 1904. Serial No. 225,583. (No model.)

To (all, wil/0m t may concern.-

Be it known that I, LUKE R. Pneu., a citizen of the United States of America, residing at Caro, in the county of luscola and State of Michigan, have invented certain new and useful Improvements in Molds for Pipe, of which the following is a specification, reference be ing had therein to the accompanying drawings.

This invention relates to a knoclzdown mold for forming hollow or tubular articles-such as sewer-pipe, Ste-from cement or similar plastic material; and its object is to so construct the mold that the article formed therein may be readily removed therefrom before the material has fully set without danger of injuring the article and also to so construct the mold that the parts are made interchangeable.

It is also an object of the invention to provide a cheap construction which may be readily taken down or set up and to provide certain other new and useful features, all as more fully hereinafter described, reference being had to the accompanying' drawings, in which Figure l is a perspective View of a device embodying the invention with parts broken away to show the construction; Fig. 2, a vertical section of the same on the line w a' of Fig. 3; Fig. 3, a section on the line z/ z/ of Fig. 2, and Fig. 1 a perspective View of one of the staves.

1 is a base-ring provided with an inwardlyextending flange or seat 2, resting on the floor or other support, and an outwardly-extending iiange or seat 3 at its upper edge, said seats being provided with holes at suitable distances to' receive pins 4L on the lower ends of the long narrow strips, forming staves or sections 5, which are set upright on said seats and form the inner and outer walls, between which the article is formed. These staves are all made of the same width, length, and form, so that they are interchangeable, and all are provided with beveled edges 6, the bevels meeting the contact-surfaces of the staves and forming sharp edges, which meet when the staves are set in place. The bevels are formed at such a slant that in removing the staves forming the inner wall each stave may be moved inward at its upper end past the adjacent staves to free it from the' article just formed. The staves forming the outer wall are held in place at their upper ends by providing each with an outwardlyextending lug 7 near its upper end to support a ring` 8 of a size to closely encircle the wall, and said ring and lugs are provided with olvienings to receive pins 9, which secure the staves to the ring and prevent their falling inward. The staves of the inner wall are oppositely set, so that their lugs extend inward, and to hold them in place a similar ring 10, of a size to just lit within the said inner wall, rests upon the lugs and is secured thereto by headed pins 1l, engagingI openings in said ring and lugs. The walls are thus securely held parallel and at a fixed distance apart to make a pipe-section of uniform thickness.

The flange 3 of the bottom ring extends a short distance inside the outer wall to form a shoulder near the end of the pipe, and the vertical inner cylindrical face or wall of said ringI forms a cylindrical end portion on the pipe to lit within the next adjacent pipe when they are laid end to end. A top ring 12, having an inwardly-extcmling iiangc 13 at its lower edge to engage and rest upon the upper ends of the stavcs forming the inner wall, lits within the upper end ofthe outer wall with a space between its outer vertical surface or wall and the outer wall, said ring thus forming a socket in the end of the pipe to receive the reduced end of the next adjacent pipe. The said ring 12 is centered on the inner wall and held in place by providing openings in the iiange 13, which are engaged by the pins 11, said pins passing through said openings and through the openings in the ring 10 and lugs 7.

In practice the staves forming the walls are first set up and secured in place by the rings 8 and 10 and the pins 9 and 11, and the cement is then iilled in between the walls up to the top of the inner wall. rlhe pins l1 are then removed, the top ring 12-sct in place and secured by reinserting the pins 1l, and the space between said ring 12 and the outer wall then Iilled in to form the iange, forming the wall of the socket in the end of the pipe. After the cement has partially set the pipe thus formed is removed by removing the pins 9 and l1, the top ring l2, and the securingrings 8 and 10. Each stave may then be moved at its upper end away from the pipe to disengage the same therefrom without danger of in any way injuring the pipe, and they are then lifted to disengage their pins 4. T he bottom ring is divided on the line 14 into two halves, which are held together by the staves when in place, the staves at each side being extended across the dividingdine and one of the pins of each engaged with an opening in one half and the other pin with an opening in the other half. If desired, this ring may be divided into several parts for convenience where the pipe is very large. After the staves are removed the pipe may be raised slightly at one side and one or more of the bottom ring-sections removed, the pipe then tilted in the other direction and the other parts removed, and thus the entire mold is taken away without the least liability of in any way defacing or breaking the molded pipe-section.

The mold is preferably made of cast metal; but it maybe made of wood or any other suitable material, and minor changes in the details of construction maybe made without departing from the spirit of the invention.

Having thus fully described the invention, what I claim isl. In a mold, the combination with vertical walls formed of detachable sections, of a base divided vertically into two or more parts, and means on the sections for engaging the parts of the base to hold the same together.

2. In a mold for hollow articles, the combination with an outer wall, of an inner wall consisting of a series of narrow vertically-extending strips or staves, the vertical meeting edges of said staves being cut away, forming, in cross-section, an acute angle with the outer surface of each stave, and means for holding said staves in place, whereby each stave may be moved inward away from the article formed, past the adjacent stave and independently thereof.

3. In a mold for tubular articles, the combination of a base portion provided with two rows of openings, an inner and outer mold- Wall formed of like staves, pins on the lower ends of said staves to engage said openings, a lug extending outward from one side of each stave near its upper end, a ring supported by the lugs on the staves of the outer wall and encircling said wall to hold the same in place, and a ring supported by the lugs on the staves of the inner wall and fitting within said wall.

4. In a mold` the combination of a ring-base formed in two or more parts and provided with an upper and a lower seat having openings, an inner and an outer mold-wall formed of like vertical staves, pins on the lower ends of said staves engaging the openings in the seats, lugs on one side of each stave having openings, a ring engaging the lugs on the staves of the inner wall and provided with openings registering with the openings in the lugs, a ring having openings registering with the openings in the lugs on the staves of the outer wall, pins in said openings in the lugs and ring, a top ring having an inwardly-extending flange provided with openings registering with the openings in the inner ring and extending outward toward the outer wall, and pins engaging the openings in said flange, inner ring and lugs on the inner wall.

5. In a mold for tubular articles, the combination of a bottom ring made in two or more parts with an inwardly-extending lower flange forming a seat and an outwardly-extending upper flange forming an upper seat with a vertical circular wall between said anges, said seats being each provided with a series of holes, an inner and an outer wall formed of staves of equal lengths, pins on said staves engaging the holes in said seats to hold the walls at a fixed distance from the circular wall on the base, a lug on one side of each stave having an opening', a securing-ring fitting within the inner wall and provided with openings registering with the openings in the lugs, a ring encircling the outer wall and having openings registering with the openings in the lugs, pins to secure said ring to said lugs, a top ring having an inwardly-extending flange resting upon the inner wall and provided with openings, and having an outer vertical circular wall coacting with the outer wall to form a flange on the article molded, and pins to engage the openings in the top ring, the securing-ring', and the lugs on the staves of the inner wall.

In testimony whereof Iaix my signature in presence of two witnesses.

LUKE R. PECK.

l/Vitnesses:

WV. F. VIXEN, H. S. MYERS.

IOO 

